Tshuaj muaj pes tsawg leeg
Cov ntsiab lus carbon (C): API 5L B yeeb nkab carbon cov ntsiab lus feem ntau nyob nruab nrab ntawm 0.15%-0.30%; thaum API 5L X46 yeeb nkab carbon cov ntsiab lus feem ntau yog nruab nrab ntawm 0.18%-0.28%.
Manganese (Mn) cov ntsiab lus: API 5L B yeeb nkab manganese cov ntsiab lus yog li ntawm 0.29%-1.20%; API 5L X46 yeeb nkab manganese cov ntsiab lus feem ntau yog 1.30%-1.40%, siab dua manganese cov ntsiab lus yog ib qho ntawm cov yeeb nkab X46 lub zog siab dua B yeeb nkab.
Phosphorus (P) thiab sulfur (S) cov ntsiab lus: API 5L B yeeb nkab phosphorus cov ntsiab lus tsis tshaj 0.030%, sulfur ntsiab lus tsis pub tshaj 0. 030% yog '; Raws li PSL1, X46 yeeb nkab phosphorus thiab sulfur cov ntsiab lus yuav tsum yog tib yam li B yeeb nkab, tab sis nyob rau hauv cov qib PSL2 nruj dua, cov ntsiab lus phosphorus tsis tshaj 0.025%, cov ntsiab lus sulfur tsis tshaj 0.015%.
Lwm cov ntsiab lus alloying: API 5L B yeeb nkab thiab API 5L X46 yeeb nkab yog cov pa roj carbon zoo ib yam nrog cov ntsiab lus alloying ntxiv. Ntxiv nrog rau cov ntsiab lus tseem ceeb xws li carbon thiab manganese, lawv kuj tseem tuaj yeem muaj me me ntawm alloying ntsiab xws li niobium thiab vanadium.
Mechanical zog
Yield zog: Lub nominal yield zog ntawm API 5L B yeeb nkab yog 245MPa; qhov tsawg kawg nkaus lub zog ntawm API 5L X46 yeeb nkab yog 320MPa, uas tuaj yeem tiv taus siab dua li B yeeb nkab yam tsis muaj deformation mus tas li.
Tensile zog: Lub zog tensile ntawm API 5L B yeeb nkab yog qhov qis, txog 414MPa; Lub zog tensile ntawm API 5L X46 yeeb nkab yog 434MPa, uas yog qhov zoo dua thaum muaj kev sib zog thiab tuaj yeem ua kom muaj kev nyab xeeb ntawm cov kav dej hauv qab tensile kev nyuaj siab.
Siv / Daim Ntawv Thov
API 5L B yeeb nkab: Feem ntau yog siv rau cov kav dej uas thauj cov nkev, dej thiab roj. Cov kav dej no nyob rau hauv ib puag ncig me me thiab cov kev xav tau ntawm cov khoom siv kho tshuab tsis nruj heev, xws li cov av zoo tib yam roj thiab cov kav xa hluav taws xob.
API 5L X46 Yeeb Nkab: siv rau cov kav dej uas xav tau lub zog siab dua los tiv thaiv qee qhov siab, xws li cov kav dej nruab nrab thiab cov kav dej ntev, lossis cov kav dej hauv cov nroj tsuag petrochemical uas muaj qee yam yuav tsum muaj rau cov kav dej, thiab lwm yam.
API 5L PSL1 X46 round steel raj
